Muffler.



PATENTED APR-.25, 1905. P. J. HEGHT.

MUFFLER.

APPLICATION FILED DBO. 13. 1904.

2 SHEETS-SHEET 1.

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PATENTED APR. 25, 1905.

I'. J. HEIGHT.

MUPFLER.

APPLICATION FILED 13150.13. 1904.

2 SHEETS-SHEET 2.

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UNITED STATES Patented April 25, 1905,

PATENT OEEICE.

FRANK J. HEOHT, OF NEV YORK, N. Y., ASSIGNOR OF ONE-HALF TO MICHAEL HECHT, OF NEV YORK, N. Y.

NIUFFLER.

y SPECIFICATION forming part of Letters Patent NO. 788,313, dated April 25, 1905.

Application filed December 13, 1904. Serial No. 236,731.

To all whom, it may con/067%:

Be it known that I, FRANK J. HECHT, a citizen of the United States, residing in New York city, borough of Bronx, New York, have invented certain new and useful Improvements in Mufflers, of which the following is a specification.

My invention relates to improvements in mufflers designed to reduce the noise of the exhaust from engines, and more particularly in gas-engines; and the objects of my invention are to provide such a muffler wherein back pressure toward an engine-cylinder will be reduced by creating suction in the muier, whereby also to assist in drawing from the cylinder the spent products of combustion to further assist in cooling the engine and to break up the said spent products to reduce or eliminate the noise of the exhaust thereof.

The invention comprises a rotative drum or wheel provided with perforated walls and mounted within a casing to be connected with the exhaust-port of an engine, whereby the exhaust products of combustion entering the drum under pressure will cause the same to rotate rapidly, and thereby break up the force of such exhaust products and deliver them in a quieted condition from the outlet of the casing.

The invention also comprises the novel details of improvement that will be more fully hereinafter set forth and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming part hereof, wherein- Figure l is a side elevation, partly broken, of a mufller embodying my invention. Fig. 2 is a vertical cross-section substantially on the line 2 2 in Fig. l. Fig. 3 is a partiallybroken plan view of the rotative wheel or drum. Fig. 4 is an enlarged perspective detail of part of the wheel or drum, showing its manner of construction. Fig. 5 is a crosssection of the hub portion of the wheel or drum. Fig. 6 is a detail section showing the connection of the split spoke and side disk, and Fig. 7 is a detail View of one of the perforated walls of the drum.

Similar numerals of reference indicate corresponding parts in the several views.

rlherotativewheel or drum (indicated generally at l) has a hub 2, perforated or foraminous radially-disposed walls 3 3f, and side plates or disks Ll, united in a rigid structure y capable of rotating freely, as upon shaft 5.

The walls 3 are shown extending transversely of the wheel in the direction of its axis, while the walls 3u extend substantially diagonally with respect to said axis, forming substantially triangularshaped radially disposed pockets or compartments 6, (see Fig. 3,) into which pockets and against which perforated walls the exhaust products of combustion from an engine exhaust-port are delivered. As a convenient means of constructing said wheel or drum I provide spokes 7, which are shown threaded at their inner ends 7 and screwed into threaded holes 2"l in hub 2, said spokes being slotted or divided longitudinally at 7" and provided with screws or the like, 8, for clamping the parts of the spokes. The edges of the walls 3 are placed within the slots of the opposed pairs of spokes, and the walls 3 are interposed between two walls 3 and are bent into substantially V or triangular shape, having the angles substantially centrally disposed and the edges bent outwardly at 3 to pass into the slots of the spokes 7. The arrangement is such that two of the walls 3a are located between two walls 3, so that the angles of the walls 3L abut, and they may be secured together by bolts or the like, 9, and the bent edges 31 of walls 3 enter thel slot of a spoke 7 on opposite sides of a wall 3, and all are thereby lirmly clamped together and to said spoke by the screws 8. The said walls are thereby all securely fastened and braced to resist the impact of spent products of combustion and to withstand high speed of rotation. The inner or lower edges of the walls 3 3 preferably rest upon the hub 2, and by preference l lill the spaces between said walls at the hub with asbestos cement, (indicated at 10,) whereby the lower edges of said walls and the hub are insulated from the heat of the gases. The plates or disks 4 are secured to the hub 2 and to the hub-spokes 7, as by means of clips 11, secured to said parts by screws, (see Fig. 4,) and at 12 are rings placed against the ends of hub 2 and the disks 4 and secured thereto by screws, whereby the disks are securely held. (See Fig. 6.)

The wheel above described is contained within a casing' 13, of any suitable construction, provided with an inlet-pipe 14, shown entering the same on aplane substantially parallel to a tangent, and with an exhaust-opening 15, which is preferably located on the same side as and below the inlet 14. The casing I have shown consists of side disks 16 and an interposed annular band 17, having its edges received in recesses 161L in disks 16, the projecting edges or iianges of said disks being' connected by bolts 18, whereby the wheel or drum 1 may rotate within said easing. While the hub 2 may be mounted in any well-known manner in bearings connected with or adjacent to the casing 13, 1 have shown the hub 2 as mounted upon ball-bearings, wherein the cups 2O are carried by the hub and the cones 21 by shaft 5, the latter entering holes in disks 16 and being securely held by nuts 22 in well-.known manner of antifriction-bearings.

In using the mufiier above described the inlet-pipe 14 is connected with the exhaust port or ports of an engine or motor, and the exhaust-gases striking the sides of the walls 3 3 cause the wheel or drum to rotate and deliver the gases through the outlet 15, so that the gases have to travel completely around with the wheel before they are discharged to the atmosphere. As the gases strike said walls and pass in to the pockets 6 they expand and seek to pass through the perforations, their pressure is red ueed, and the revolving walls cut up the How of the gases, whereby when the latter are discharged through the outlet 15 practically all noise from the explosion of the engine is eliminated. Furthermore, the revolving wheel or drum acts to create a suction through the inletpipe 14 tending to draw the spent gases from the engine cylinder or cylinders, thereby also serving to assist in cooling the cylinders. The wheel or drum will continue to revolve after the explosions in the engine cease, serving thereby to suck or scour exhaust-gases from the cylinders, so that the cylinders will be in a relatively clean condition to receive a mixture when the engine is again started. lFurthermore, if the wheel or drum should stop rotating' while the engine is running the perforations in the walls 3 3 will still perform work, substantially as an ordinary mufHer, because the gases can escape through the perforations in the walls, though not so completely nor satisfactorily as when the drum revolves.

My invention is not limited to the particular details of construction nor the arrangements of parts shown and described, as the same may be varied without departing from the spirit thereof.

Having now described my invention, what l claim is- 1. A mufiier comprising a casing provided with an inlet disposed substantially tangentiall y and an outlet, and a rotative wheel provided with walls located within said casing in line with the inlet to be engaged and rotated by spent products of combustion entering the casing through said inlet to discharge said products through said outlet, substantially as described.

2. A mufiier comprising a casing provided with an inlet and an outlet, and a rotative wheel mounted within said casing and provided with perforated walls providing pockets to receive spent products of combustion and to discharge them by the rotation of the wheel through said outlet, the inlet being disposed. on a plane substantially tangential with respect to the axis of the wheel, said walls bcing located adjacent to the inlet so that exhaust products will impinge directly upon the walls as discharged :from the inlet, substantially as described.

3. A muiier comprising a casing provided with an inlet and an outlet, and a wheel having radially-disposed walls, certain of said walls extending substantially parallel to the axis of the wheel and other of said walls extending at an angle to the axis of said wheel providing pockets to receive spent products of combustion from the inlet and deliver them to the outlet by the rotation of the wheel, substantially as described.

4. .In a muiiier, a rotative wheel provided with perforated walls and disks at the ends of the walls providing pockets to receive and deliver spent products of combustion, substantially as described.

5. VIn a muflier, a rotative wheel provided with radially-disposed walls, certain of said walls extending substantially parallel with the axis of the wheel and certain other walls cxtending at an angle with respect to said axis, forming pockets to receive and discharge spent products of combustion, substantially as described.

6. In a muflier, a rotative wheel having radially-disposed perforated walls extending at an angle with respect to the axis of the wheel, adjacent walls being secured together substantially centrally, and means lfor firmly holding the outer edges of said walls, substantially as described.

7. ln a muffler, a rotative wheel provided with radially-disj'iosed walls that are bent in angular form extending at angles to the axis of the wheel, the angles of adjacent walls being secured together, and means for firmly holding the edges of said walls, substantially as described.

8. In a mulier, a rotative wheel comprising IIO radially-disposed walls, certain of which walls extend lsubstantially parallel to the axis of the wheel and certain other of said walls beingI located between said parallel walls and bent substantially centrally, the angular portions of two walls abutting, and means for firmly connecting said walls, substantially as described.

9. In a mufller, a rotative wheel having' a hub provided with radially-disposed walls extending at an angle to the axis of the wheel, the angles of adjacent walls being located between the outer edges of the walls, substantially as described.

l0. In a muier, a rotative wheel having a hub provided with divided spokes, radiallydisposed walls secured at their edges between the members of said spokes, and disks located at the ends of said walls, providing pockets to receive and discharge spent gases, substantially as described.

11. In a muffler, a rotative wheel having a hub provided with divided spokes, radiallydisposed walls having their edges secured between the members of said spokes, certain of said walls extending substantially parallel with the axis of said wheel and certain other walls extending at an angle to said axis, and disks secured adjacent to the edges of said walls, providing pockets to receive and discharge spent products of combustion, sul stantiall y as described.

l2. In a muffler, a rotative wheel provided with a hub, radially-disposed perforated walls, means for firmly holding the walls, and fireproof insulation placed between the walls and upon the hub, substantially as described.

13. A mufiler comprising a casing provided with an inlet and an outlet, a rotative wheel having a hub and radially-disposed perforated walls, and disks at the ends of said walls, providing pockets to receive and discharge spent products of combustion, substantially as described.

14. A muffler comprising a casing provided with an inlet and an outlet, and a rotative wheel having a hub and radially-disposed perforated walls, and disks at the ends of said walls, certain of said walls extending substantially parallel with the axis of the wheel and certain other walls extending at an angle to said axis, the angular walls being secured together, substantially as described.

FRANK J. HECHT.

Witnesses:

MICHAEL HECHT, T. F. BoURNE. 

